SHAFAQNA – It is permissible for a person to adopt a child and taking care of a deserving child is earns the individual reward, but the child is not considered his son or daughter; the child remains a stranger (non-mahram) to him or his wife and he or she does not inherit the person who has adopted him or her. Adoption in the sense to change a child’s name and register him in his ID card as his own child is not permissible. It is not permissible to change the child’s father name.
Ayatollah Ali Sistemi